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Author Topic: Pentranic 14 inch CH-250 touchscreen problems  (Read 1478 times)

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kvicala2000

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Pentranic 14 inch CH-250 touchscreen problems
« on: May 18, 2009, 09:50:09 pm »
Have a Pentranic Ch250 14" monitor in a Uwink Eye Con touchscreen game
running Megatouch Force software.
The screen had a horz line. Fixed by replacing the vertical output,
resistor and cap.
Now the game plays, but there is jitter noise in the background. If I
freeze spray the power supply switching transistor, it will go away
briefly and the picture is clear. I replaced two small caps that were
by it, 47uf 25volt with a 100uf 50v and a 100uf,but this did not help,
it may have made it worst. There is 150uf 400v cap, could this do it
or the transistor going bad.
Anyone have schematics
Karl

Rickn

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Re: Pentranic 14 inch CH-250 touchscreen problems
« Reply #1 on: May 20, 2009, 02:48:03 pm »
E-Mail me and I will send schematics and service manual.

Good Luck
Rick Nieman
Rick@niemandisplays.com
www.niemandisplays.com
Always happy to help.., for the best in displays
Rick Nieman
Rick@Niemandisplays.com
www.niemandisplays.com
1023 Rife Rd Cambridge, Ontario Canada N1R5S3
519-621-1722